... 2. Voltage:250v 3. Certification:CE porcelain lamp socket,screw lampholder, lamp base1. Series: E27, E26, E40, E14, B222. Certification: CE, LVD, ROHS3. Inserted metal: ... engaged in the exportation and manufacturer of all kinds of lamp holder. "The best quality, the best price" is ... . Moreover, all products we sell have obtained the certification CE, LVD, ROHS.If you interested in our products, pls ...